Residential AC Systems: Carrier and Bryant

RESIDENTIAL AIR CONDITIONING SERVICE MONTGOMERY COUNTY MD

Shemtov Systems offers residential air conditioning services in Montgomery County MD. We offer a wide variety of makes and models of central air conditioning systems including Carrier,and Bryant shown below. we will offer you the ideal air conditioning system for your home .It would be tailored to your own unique: the area you live in, how your home is built, and to the comfort and air quality you are seeking. We will take into consideration the need to keep out dust and pollen to reduce allergies and asthma sensitivity .
Shemtov Systems is a local HVAC company. that have been providing HVAC services to Maryland residents for over 30 year. we specialize in residential heating, Heat pumps, furnaces and air conditioning. As well as small commercial rooftops and commercial heating systems .

Air conditioning products

Shemtov Systems offers a wide verity of residential products. Our technicians are trained and certified to install,
service and repair most brands including Bryant shown here. we provide full service to residential and
light commercial, heating and, air conditioning systems.

We Service

The following areas for HVAC, Heating & Air Conditioning Services for both Commercial & Residential

Residential cooling equipment is bought on four specifications: rated capacity in Btu per hour, the efficiency pair SEER2 and EER2, how finely the compressor can stage, and the indoor coil the outdoor unit is certified with. Everything built since 2025 uses R-454B refrigerant. To walk through condenser tiers and coil matches for a Silver Spring or Montgomery County home, call Shemtov Systems at 240-355-3333.

Key takeaways

Maryland sits in the federal Southeast efficiency region, where split systems under 45,000 Btu per hour must meet 14.3 SEER2.
Larger split systems carry a 13.8 SEER2 floor; both took effect on January 1, 2023.
A SEER2 number reads lower than the SEER number in older brochures because the test is harder.
Bryant ended residential R-410A production on January 1, 2025; Puron Advance is its R-454B replacement.
Ratings are published for a certified combination of outdoor unit, indoor coil, and blower, not for a condenser alone.

How do I read the efficiency numbers on a condenser?

SEER2 is a seasonal average: cooling delivered across a season divided by the electricity used to deliver it. EER2 is taken at one hot outdoor condition instead of averaged, so it says more about a 95 degree afternoon than about the year. Both come from the M1 test procedure, which drives the equipment against a higher external static pressure than the old SEER test did. That is why literature printed before 2023 shows a higher figure for the same machine.

What does an AHRI certified reference number tell me?

An outdoor unit carries no rating on its own. Capacity and efficiency are certified for a combination: that condenser, a named indoor coil, and in a ducted system a named furnace or air handler. AHRI publishes each combination under a reference number, so a proposal listing it lets you look up the rating yourself. A phrase such as up to 17 SEER2 usually describes the strongest pairing in a family, not the one quoted for your house.

Should I choose a single-stage, two-stage, or variable-capacity compressor?

A single-stage compressor runs at one output, reaches setpoint quickly, and stops. A two-stage unit spends most of the season on its low step, roughly two thirds of capacity. Variable-capacity models modulate across a wide band and hold long, gentle runs. Montgomery County sits in ASHRAE climate zone 4A, mixed humid, where August is a moisture problem as much as a temperature problem: longer runs at lower airflow keep the coil cold and wet, so more water leaves the air. Published sound ratings also fall as the tiers rise.

What does the move to R-454B change when buying now?

Bryant stopped building residential R-410A equipment on January 1, 2025 and now ships Puron Advance, its brand name for R-454B, which carries about 75 percent less global warming potential; Carrier uses the same refrigerant. R-454B is classified A2L, or mildly flammable, so cabinets, service valves, and often a refrigerant detection system are engineered as one design. The two refrigerants are not interchangeable, which rules out putting a new outdoor unit on an R-410A coil. Existing R-410A systems can still be serviced and charged.

What should a written air conditioning proposal spell out?

Ask for both model numbers, outdoor and indoor, the AHRI reference number for that pair, rated capacity in Btu per hour, SEER2 and EER2 for that combination, and the sound rating. It should say what happens to the existing line set, whether the condensate line gets a float switch, and who pulls the permit and schedules the inspection. Warranty terms belong in writing too, including the registration deadline manufacturers set for the longer parts coverage. Capacity follows a load calculation, not the size of the outgoing unit: see what size air conditioner your home needs.

Frequently asked questions

Does a higher SEER2 tier pay for itself here?

Not on its own. Maryland's cooling season is shorter than the Gulf states', so the dollars between two tiers add up slowly. The stronger arguments are humidity control, a lower sound rating, and steadier temperatures room to room.

Can I replace just the outdoor unit?

Not with current equipment. An R-454B condenser cannot run on an R-410A coil, and even within one refrigerant an uncertified pairing puts the system outside the combination its published rating came from.

How long does central cooling equipment last?

Plan on fifteen to twenty years in this climate. Run hours, maintenance, a correct refrigerant charge, and whether the indoor coil was properly matched all move a given system within that range.

What is a communicating system?

A communicating system replaces on-off thermostat wiring with a data connection between thermostat, indoor unit, and outdoor unit. It allows finer modulation, but the parts are brand matched, so a generic thermostat will not work.

Talk to Shemtov Systems

Shemtov Systems will review condenser tiers, coil matches, and AHRI ratings for a house in Silver Spring, Wheaton, or elsewhere in the county. Call 240-355-3333.

Homeowner guides

Straight answers to the questions we hear most from Montgomery County homeowners.